Today we’re going to explain how exchangers...exchange heat. We’ll look at concentric tubes, finned tubes, plate heat exchangers, and shell-and-tube heat exchangers. And we’ll look at some equations to help us sort through heat transfer and decide what heat exchangers are best suited for our designs.
In our increasingly globalized world, a single infected person can board a plane and spread a virus across continents. Mark Honigsbaum describes the history of pandemics and how that knowledge can help halt future outbreaks. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 8-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.
Students follow weather forecasts to gauge their accuracy and produce a weather report for the class. They develop skills of observation, recording and reporting.
Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and Hippolyte Fizeau's measurement of the speed of light in 1849. A quiz, thought provoking question, and links for further study are provided to create a lesson around the 7-minute video. Educators may use the platform to easily "Flip" or create their own lesson for use with their students of any age or level.
A lesson plan for 4th grade science. Kids create a version of the marble roll project to simulate a manufacturing process.
Join Proton the cat as he tests out the professor's newest invention - goggles that allow a person to see sound in addition to hearing it. As you take a tour of the lab, you'll learn all about the science of sound, from how our ears allow us to hear sound, to the differences between louder and softer sounds.
Ever wonder why you can’t hear a dog’s whistle, yet when you use one, all the neighborhood dogs come running? Dogs are able to hear at higher ranges than that of humans.
Sound is a type of energy created by a rapid back-and-forth movement or vibration. When an object vibrates in the air, the air particles move around and cause other particles to move and bump into other particles, which carry the vibration through the air. This sound wave will keep going until it runs out of energy. When your ear is in range of the sound wave (before it loses all its energy) you hear a sound.
Sounds differ from one another because they vibrate at different speeds. This means, how often a sound wave will occur over time, or its frequency. When the vibrations are fast, you will hear a high note, and when the vibration frequency slows, the note will lower. Your ears collect and process the sounds, and then send signals to your brain in response
As the Atlantic Ocean warms, many marine speciesincluding commercially important fish stocksare moving further north along the Northeast United States. As a consequence, fishing boats based in traditional ports need to travel further to catch the same fish, or change their strategy to pursue different species of fish. In turn, businesses that serve fishing communities may need to purchase new equipment, develop new practices, or encourage workers to gain new skills. In order for fisheries and the businesses that depend on them to prepare for such changes, fisheries managers need tools to identify which fishery resources may be most vulnerable to our changing climate.
In this problem-based learning (PBL) activity, students take on the role of a student research scientist and explore the role of solar energy in determining climate. Students conduct experiments to observe how a change in water phase affects surface temperatures. Materials required for the investigation include 2 aquariums, dry sand or soil, two heat lamps, and two thermometers.The lesson is supported by teacher notes, answer key, glossary and an appendix with information about using PBL in the classroom. This is the second of three activities in Investigating the Climate System: Energy, a Balancing Act.
Students learn about the underlying engineering principals in the inner workings of a simple household object -- the faucet. Students use the basic concepts of simple machines, force and fluid flow to describe the path of water through a simple faucet. Lastly, they translate this knowledge into thinking about how different designs of faucets also use these same concepts.
Students investigate different forms of hybrid engines as well as briefly conclude a look at the different forms of potential energy, which concludes the Research and Revise step of the legacy cycle. Students are introduced to basic circuit schematics and apply their understanding of the difference between series and parallel circuits to current research on hybrid cars.
In this problem-based learning activity, students learn how the intensity and distribution of rainfall and the structure of clouds are critical information for flight navigators. Students assume the role of climatologists and assist a newspaper reporter in determining the veracity of a pilot's statement about weather conditions he encountered in flight using TRMM (Tropical Rainfall Measuring Mission) satellite data. The resource includes teacher notes, student worksheet, glossary and an appendix introducing problem-based learning. This resource is the second of the 3-part learning module, Investigating the Climate System:Precipitation.
In this problem-based learning activity, students learn about weather forecasting and the role of the TRMM (Tropical Rainfall Measuring Mission) satellite in data collection. Assuming the role of climatologists, students assist a reporter in determining the accuracy of weather predictions published in The Old Farmer's Almanac. The lesson requires a street map of the local community, acetate sheets to cover the map, materials needed to build a homemade rain gauge, and sample pages of the almanac. Teacher notes, student worksheet, glossary and an appendix introducing problem-based learning are included. This resource is the first of the 3-part learning module, Investigating the Climate System: Precipitation.
In this 2-part inquiry-based lesson, students conduct a literature search to determine the characteristics of the atmospheres of different planets (Venus, Mercury, Mars and Earth). After collecting and analyzing data, student teams design and conduct a controlled physical experiment using a lab apparatus to learn about the interaction of becomes COå_, air, and temperature. The resource includes student worksheets, a design proposal, and student questions. Connections to contemporary climate change are addressed. This lesson is the first of four in Topic 4, "How do Atmospheres Affect Planetary Temperatures?" within the resource, Earth Climate Course: What Determines a Planet's Climate?
In this kinesthetic activity, the concept of energy budget is strengthened as students conduct three simulations using play money as units of energy, and students serve as parts of a planetary radiation balance model. Students will determine the energy budget of a planet by manipulating gas concentrations, energy inputs and outputs in the system in this lesson that supports the study of climate on Mars, Mercury, Venus and Earth. The lesson supports understanding of the real-world problem of contemporary climate change. The resource includes a teacher's guide and several student worksheets. This is the second of four activities in the lesson, How do Atmospheres affect planetary temperatures?, within Earth Climate Course: What Determines a Planet's Climate? The resource aims to help students to develop an understanding of our environment as a system of human and natural processes that result in changes that occur over various space and time scales.
In this activity, students simulate the interaction of variables, including carbon dioxide, in a radiation balance exercise using a spreadsheet-based radiation balance model. Through a series of experiments, students attempt to mimic the surface temperatures of Earth, Mercury, Venus and Mars, and account for the influence of greenhouse gases in atmospheric temperatures. The activity supports inquiry into the real-world problem of contemporary climate change. Student-collected data is needed from activity A in the same module, "How do atmospheres interact with solar energy?" to complete this activity. Included in the resource are several student data sheets and a teacher's guide. This activity is part of module 4, "How do Atmospheres Affect Planetary Temperatures?" in Earth Climate Course: What Determines a Planet's Climate? The course aims to help students to develop an understanding of our environment as a system of human and natural processes that result in changes that occur over various space and time scales.
This video lesson is on the details of cancer cell growth. How do cancer cells grow? How does chemotherapy fight cancer (and cause negative side effects)? The answers lie in cell division. George Zaidan explains how rapid cell division is cancer壽猻 "strength" -- and also its weakness.
In this demonstration, students explore the concept of greenhouse warming. They determine whether an increase in the amount of heat-trappping gases in the atmosphere can cause the temperature on Earth to rise. Students compare the relative heat retention in two experimental systems that are identical except for one being covered with plastic wrap. Materials required include two small aquarium tanks, plastic wrap, two clamp lamps with 60 watt bulbs, modeling clay, rocks and pebbles, and two thermometers. Teacher background information, student worksheets and a scoring rubric are included. This is Activity 1 of the module Too Many Blankets, part of the lesson series, The Potential Consequences of Climate Variability and Change.
How Do Ocean Currents Work? is a TED-Ed lesson that makes a fantastic addition to TED-Ed's list of lessons about oceans.
In How Do Ocean Currents Work? viewers learn about the forces influencing surface and deep ocean currents. The lesson is told through the story of 28,000 rubber ducks drifting around the world.
How do we teach students to identify fake news?
In a world where it is increasingly dangerous to simply trust what we read and see.
There is a fact sheet available for download as well.
Students will design a car that is powered by air and write a resource book article on how they did it